Dog House Training I Have 2 Questions About House Training A Dog?

I have 2 questions about house training a dog? - dog house training

First, I have a question about crate training. I made a room in my house and eat the dog to the toilet, play and sleep. So far my 3 months old puppies Pomchi was really good with the litter box in the closed area. My dog can go to the bathroom alone = D. But if you have access to another piece that does not go to the toilet = (How do I go to the bathroom in the litter without closing it apart from other spaces is?

The second question is, how do I prevent my dog to stop jumping on his legs, bite your hands and quit?

Thank you!